Pump



April 29, 1941. G. A. PATTERSON PUMP Filed Oct. 10. 1938 3 Sheets-Sheet 2 April 29, 1941- G. A. PATTERsoN 2,240,12-1

I PUMP mad oct. 1o, 195s vs Smets-sheet s niilmgllu Patented Apr. 29, 1941 PUMP Glenn A. Patterson, Davenport, Iowa, assigner to Red Jacket Manufacturing Co., Davenport, Iowa, a corporation of Iowa Application October 10, 1938, Serial No. 234,104

18 Claims.'

This invention relates to pumps, and is directed more particularly to the form of the piston and cylinder and to the pump chamber and valve arrangement.

An important object of the invention is the provision of-a reciprocating type pump characterized by the absence of the conventional crosshead and wrist pin joint and the resultant simplicity of the plunger drive construction.

Another object of the invention is the provision of a pump wherein the assembly of the plunger and the plunger drive mechanism is facilitated, and the consequences of small misalignment are practically eliminated.

I have also aimed to provide a pump having an improved form of pump cylinder and improved means for mounting the pump cylinder within the pump.

A further object of the invention is to provide a pump wherein the noise caused by water hammer, shock and the like are practically eliminated.

I have also aimed to provide a pump wherein the side thrust common to reciprocating plunger mechanisms is very largely eliminated, thereby reducing wear and vibration, and materially increasing the life of the parts.

I have further aimed to provide a pump wherein the parts are arranged in a novel fashion for immediate and free access to the various parts for service and repair including the valves, the cylinder, the plunger, and the plunger leathers.

Another object of the invention is the provision of a novel arrangement of the pump chambers and valves which serves to reduce the overall length of the pump, simplifies manufacturing and assembly operations, and increases the operating eiiiciency thereof.

Other objects and advantages will become apparent from the following description and the accompanying drawings, in which- Figure 1 is a vertical section taken longitudinally with respect to the cylinder showing a water lubricated pump embodying my invention;

Fig. 2 is a section on the line 2-2 of Figure 1;

Fig. 3 is a section on the line 3-3 of Figure 1;

Fig. 4 is a section onthe line 4-4 of Figure 1;

Fig, 5 is a section on the line 5 5 of Figure 1;

Fig. 6 is a section on the line 6-6 of Figure 1;

Fig. 7 is a fragmentary section showing the pump cylinder and plunger of Figure 1;

Fig. 8 is a section similar to Fig. 7 showing a modified form of cylinder construction, and

Fig. 9 is a section similar to Fig. 7 showing a further modified form of cylinder structure.

I have herein shown the invention as embodied in a water lubricated suction lift pump, though itwlll be understood that many of the features thereof are not limited to this particular application. The numeral I0 (Figure l) designates generally an electric motor having a pulleyV (not shown) adapted to drive a larger pulley II by means of a belt I2. The pulley II is attached to a shaft I3 (Fig. 2) which carries a crank and.

crank pin designated generally by the numeral I4. The shaft I3 extends through a water lubricated bearing I5 through the walls of a body casting I6 and supports the crank I4 within a crank chamber I7. The body casting has a pedestal support I8 and laterally disposed feet I9 for attachment of the pump to suitable supporting structure.

A pressure switch ZI of conventional design is carried on the motor I9 and is connected to the outlet chamber of the pump by means of a pressure tube 22 for the purpose of transmitting the pressure to the switch to actuate the same. Positioned forwardly from the body casting I3 is an intermediate or air chamber casting designated generally by the numeral 23 and' secured to the body casting through lugs 2t and 25, and studs and cap nuts 26 and 21, a gasket 28 of suitable material being interposed between the two elements. A front casting or valve cover 29 is secured to the forward side of the intermediate casting 23 by means of studs and cap nuts 3| and 3,2, a gasket 33 of suitable material being interposed between the two members. The rear end of the crank chamber II is closed by a plate 34 secured in place by bolts 35, a gasket 36 being interposed for the purpose of sealing the junction between the elements, This plate permits of access to the crank I4 and associated parts. l

'I'he crank chamber I1 extends forward through the intermediate casting 23 as shown at 3'Iy and has an opening 38 into a side chamber 39 of the forward casting 29, the interior of the forward casting 29 being separated into the side chamber 39 and a central chamber 4I by means of a partition 42. An opening 40 is provided between the crank chamber and the central chamber 23 which is normally closed in a manner presently to be described. Positioned in the crank chamber I1is a connecting rod 43. one end thereof being journaled on a crank pin 44 of the crank I4 through water lubricated bearings 45 of known construction. The forward end of the connecting rodI 43 carries a plunger designated generally by the numeral 46` having an enlarged end portion 41 against which a pump leather 48 is adapted to seat, and a central threaded -portion 49 carrying a spacer 5I against which a second pump leather 52 seats, the same being held in position by a spacer Il secured on the threaded portion by a pair 4of nuts 64. Y

The plunger 46 reciprocates in a cylinder having a rigid liner (in this instance a cylindrical metal liner 65) enclosed within a sleeve 56,- in this instance formed of resilient and flexible rubber. The sleeve has an annular lange 51 thereon adjacent the forward end of the cylinder, and embedded therein is a steel or similar washer-like disk 56. 'I'he flange 51 and the disk 56 are substantially larger in diameter than the opening 4|! and abut against an annular shoulder 59 around the opening 46 (Figs. 1 and '1). 'I'he cylinder is secured in position by a plurality of screws 6I passing through the disk 56 and threaded into the forward surface of the shoulder 59. The disk 56 functions to securely fasten the cylinder in place, and in addition, prevents longitudinal pulsating movement of the cylinder under changes in pressure. The resilient sleeve 56 is substantially smaller than the opening 40, whereby to permit of oscillating movement of the cylinder with respect to its support. It will be seen that through this construction the connecting rod 4I may be caused to extend in unbroken fashion directly from the crank i4 to the plunger 46, thereby eliminating the usual crosshead or other means for changing rotary motion to linear motion. Thus, upon rotation of the crank I4 the connecting rod 46 moves between the angular positions shown in Fig. 7, and, because of the resilient mounting of the cylinder, the cylinder follows the angular movement of the rod. The construction is such, however, that in spite of this resiliency the required difference in pressure can be maintained between the crank chamber l1 and the chamber 4|.- The sleeve 56 is preferably vulcanized or otherwise continuously attached to the outer surface of the liner 56 and the rear end of the liner is curled outwardly as shown at 62 and the forward end of the liner is preferably terminated short of the forward end of the sleeve and also flared outwardly slightly as shown at 66 so as to seat in the rubber sleeve and thereby prevent relative longitudinal movement therebetween.

'I'he central casting 23 is so formed as to provide laterally spaced chambers 64 and 65 divided by a somewhat vertically disposed partition 66 which branches as shown at 61 and 68 adjacent the lower end thereof to provide the portion 61 of the crank chamber. The chamber 64 has a threaded inlet opening 66 for the entrance of liquid into the chamber 64, and the forward side of the chamber 64 is closed by a wall 11 which has an opening 11 for the reception of a valve designated generally by the numeral 13, having a ported body member 14 threaded or otherwise seated in the opening 12, from which projects into the chamber 69 a stem 15 upon which is slidably carried a closure member 16 normally urged to the closed position against the body member 14 by means of a spring 11.

'I'he chamber 4I also has an opening through the wall 1I into the chamber 64, within which a valve 16 is positioned identical with the valve 13 and positioned to permit the iiow of liquid from the chamber 64.

The chambers 36 and 4I have upper openings 19 and 6l in a wall 62 which closes the front side of the chamber 65 within which openings are positioned valves 66 and 64 identical with the valve 1I arranged with the closure member 16 and stem projecting into the chamber 66 to permit ilow of liquid from the chambers and 4| to the chamber 66. The chamber 65 has a threaded outlet opening l5 and a baille member 86 extending from front to back of the chamber, as best shown in Figs. 3 and 5.

In operation, the opening 66 is connected to the source of water or other fluid supply, and the opening 65 is connected to the point at which it is desired to deliver the liquid. The crank I4 is driven by the motor I6 through the belt i2, pulley Il and shaft i6, causing the connecting rod 43 to be reciprocated during the movement of which the flange 51 and part of the sleeve 56 nexes to permit of change in the angular position of the connecting rod. As the plunger 46 moves in its back stroke, that is, toward the right facing Figure l, reduced pressure is created in the chamber 4I, whereupon the valve 16 opens, drawing liquid into the chamber 64 and from this chamber into the chamber 4l by way of the valve 18. Simultaneously increased pressure is applied to theliquid within the crank chamber I1 causing liquid to flow therefrom through openings 31 and 36 into the chamber 39 and thence by way of the valve 63 into the chamber 65, causing fluid to be displaced from the chamber 66 through the opening 65 tothe point of delivery. The baille I6 prevents the liquid from flowing directly from the valve 6I to the opening 65 and prevents draining of the Water away from the valve. On the forward stroke of the plunger 46 increased pressure is produced in the chamber 4I, the valve 13 closins under the action of the spring and the increased pressure, and the valve 64 opening under the increased pressure, thereby causing liquid to flow from the chamber 4l into the chamber by way of thevalve 64 again displacing liquid from the chamber 66 through the Aopening 65. Simultaneously reduced pressure is created in the crank chamber I1 in response to the forward stroke of the pump. Whereupon the valve 13 opens under the reduced pressure, drawing liquid into the crank chamber by way of the chamber 36 and the openings I6 and 31, the valve 66 closing at the start of the forward stroke in response to the action of its spring andthe reduced pressure within the chamber 30.

Referring now more particularly to Figs. 'I and 8, in Fig. 8 I have shown a modification of one phase of the invention wherein the cylinder consists of a metal tube 61 forming the cylinder proper, the tube having a sleeve 66 of resilient material such as rubber positioned intermediate its ends, the sleeve being vulcanized or otherwise attached to the metal cylinder 61 and having an annular flange 66. The cylinder is held in position by means of a bushing-like structure 9| having a cylindrical portion 62 adapted to abut against the ilange 66 and urge the same against an annular shoulder 63 formed around the opening 46 of the pump. The bushing-like structure is secured in position by means of screws or bolts passing through a rim 64 on the cylindrical portionll. In this way the annular flange 66 is nrmly gripped between the cylindrical portion 62 and the shoulder 6I which holds the cylinder in position and at the same time seals the junction between the chambers.

In the form shown in Fig. 9 I employ a plunger 85 having a smooth outer surface 66 adapted to reciprocate in a sleeve 91 of rubber or other v cylinder of the pump.

annular ange 98 integral therewith and also of' similar resilient material. Thus, in this form o! the invention the sleeve 91 forms in effect the The sleeve 91 has,y an

resilient material clamped against an annular shoulder 99 by means of a cylindrical ring lili held in position by means of bolts |02. It will be understood that the structures shown in Figs. 8 and 9 are alternative constructions for the cylinder and plunger portion only of the device shown in Figure 1, and are suitable for substitution therefor in the pump.

Attention is directed tothe fact that because of the nature of the pump cylinder and mounting I am enabled to completely eliminate the conventional crosshead and wrist pin joint common to reciprocating pumps without incurring any oi' the objectionable features of prior constructions. It will be seen that because of the resilient mounting of the cylinder, the cylinder may accommodate itself to the position of the plunger and the connecting rod, thereby greatly simplifying the construction of the drive mechanism and also simplifying the assembly, since the cylinder can accommodate itself to small misalignments. It will also be observed that since the cylinder is carried entirely on the resilient flange, muchof the noise common to pumps of this character, such as that occasioned by water hammer and shock, is greatly reduced. Another feature of the invention is the arrangement of the chambers and castings which greatly-simpliiies the construction, reduces its overall length and permits of free access to all parts of the pump. For example, by removing the nuts 3l and 32, access may be had to all of the valves of the pump, to the pump cylinder and to the pump plunger, thereby greatly facilitating repair operations. A further feature of the invention is the arrangement of the valves in the chambers. It will be observed that these valves are all arranged with vertical seats, and in this way are rendered practically self-cleaning since dirt and other foreign matter will not lodge on the valve seats. Another advantage of the structure lies in the form of the cylinder wherein the cylinder proper is formed by a metal tube to the outer surface of which is flxedly secured by vulcanization or otherwise, a resilient sleeve giving relatively wide support to the tube, the sleeve having a ilange by which attachment is accomplished, the iange serving not only to support the cylinder, butfunctioning as a part of the dividing wall between the chambers so that a difference of pressure may be developed in the adjoining chambers by operation of the plunger.

It will be understood that I have herein shown a specific embodiment of the invention by way off illustration, and do not wish to be limited specically thereto except as required by the prior art and the scope of the appended claims, in which- I claim:

1. The combination in a pump having a reciprocating plunger, of a pump cylinder comprising a resilient and flexible sleeve positioned for reciprocation of the plunger therein, and an annular ange of resilient and exible material for supporting the cylinder to flex with movement of the plunger for maintaining alignment'thereof with the plunger.

2. The combination in a pump having a reciprocating plunger, of apump cylinder comprising a rigid tube for reciprocation of the plunger therein, a resilient and flexible sleeve positioned a for attachment of th around the outer surface of said tube. and a resilient and exible flange 'on said sleeve for supporting the tube and sleeve to flex with lateral movement oi' the plunger to maintain alignment of the tube with the plunger.

3. The combination in a pump having a reciprocating plunger, oi' a pump cylinder comprising a -rigid tube for. reciprocation of the plunger therein, a resilient and flexible sleeve positioned around the outer surface of said tube, means other than the elasticity of the sleeve for permanently afiixing the sleeve to the tube. and a resilient and flexible flange on said sleeve for supporting the tube and sleeve to ex with lateral movement of the plunger to maintain alignment of the tube with the plunger.

4. 'I'he combination in a pump having a reciprocating plunger, of a pump cylinder comprising a rigid tube for reciprocation ofthe plunger therein, a rubber sleeve of about the same length as said tube positioned around the outer surface of the tube vulcanized thereon, and an outwardly disposed rubber iiange integral withsaid sleeve for supporting the tube and sleeve to flex with lateral movement of the plunger.

5. The combination recited in claim 4 wherein the flange is located at one end of the sleeve.

6. The combination recited in claim 1 wherein the flange is located about midway between the ends of the sleeve portion. e

7. The combination recited in claim 4 wherein the tube is provided with outwardly flared ends engaging the sleeve.

8. 'I'he combination in a pump, of a cylinder comprising a resilient and flexible sleeve, a plunger reciprocable therein, said plunger having smooth walls of a length such that the ends do not enter the sleeve at the ends of the plunger stroke, and an annular flange of resilient and exible material integral with said sleeve to flex with lateral movement of the plunger to maintain alignment of the sleeve and plunger.

9. The combination recited in claim 1 wherein said flange carries a rigid disk embedded therein flange to supporting structure.

10. The combination in a reciprocating pump, of adjoining chambers having an opening therebetween, a pump cylinder having a smaller external diameter than said opening positioned therein, a plunger reciprocable in said cylinder, and means for resiliently securing said cylinder within said opening in axial alignment therewith to flex with lateral movement of the plunger and for preventing communication between said chambers through said opening.

l1. The combination in a reciprocating pump, of adjoining chambers having an opening therebetween, a pump cylinder comprising a resilient and exible sleeve, a plunger reciprocable in said sleeve, an annular flange on said sleeve integral therewith, and means engaging said flange for securing the cylinder in said opening in axial alignment therewith to ex with lateral movement of the plunger to maintain alignment of the sleeve and plunger.

12. The combination in a reciprocating pump, of adjoining chambers having an opening therebetween, a pump cylinder comprising a rubber sleeve of smaller diameter than said opening, a plunger reciprocable in said sleeve, an annular rubber ange integral with said sleeve and of greater diameter than said opening, and means for securing the sleeve within said opening in axial alignment therewith to flex with lateral 4 4antonin f movement oi .the plunger comprising an annular shoulder around said opening. and means for clamping said flange thereagainst.

13. The combination in a pump ot a crank, a

connecting rod having bearing at one end on the crank, a plunger fixed to the opposite end of the crank, a pump cylinder positioned for reciprocation of the plunger therein, said cylinder comprising a resilientl sleeve having an annular iiange oi resilient material, and means engaging said annular flange for supporting the cylinder for iiexing thereof with change in angularity of said connecting rod.

14. The combination in a pump having a reciprocating plunger, of a pump cylinder comprising a sleeve positioned for reciprocation oi' the plunger therein, an outwardly disposed ange of ilexible material positioned annularly of said sleeve, and rigid means for engaging said flange substantially throughout the circumference thereof to secure the cylinder to a support, and maintain alignment thereof.

15. The combination in a pump having a reciprocating plunger, oi a pump cylinder comprising a sleeve positioned for reciprocation of the plunger therein, an outwardly disposed flange of ilexible material positioned annularly of said sleeve, and means for securing the ilange to a support and preventing pressure pulsations therecomprising a ring embedded annularly in said ilange and rigidly secured to a supporting member. z

17. The combination/in a pump ot a' pump cylinder, a reciprocating plunger therein, a main body having a crank chamber, an intermediate member, an end member having a pair of chambers, said intermediate member having laterally disposed inlet and outlet air domes. one of said domes having a front opening, a vertically disposed wall in said end chambers at the parting line between said intermediate and end members Y shaped to close said iront opening, said wall having valve openings communicating between said end chambers and said air dome. the other of said air domes having vertically disposed walls at said parting line provided with valve openings communicating with said end chambers. and pressure operated valves for said valve openings with the seats thereof arranged vertically, said valves constituting all o! the pump valves, the valve stems for the last mentioned openings pro- Jecting into said end chambers and the valve stems for the nrst mentioned openings `being carried on said first mentionedwall and projecting into said one ol' said air dome for removal therefrom with said end member whereby upon removal of said end member all of said va1ves project from said walls along said parting line.

18. The combination recited in claim 17 wherein said pump cylinder and reciprocating plunger are positioned between said crank chamber and one of said end chambers, and means tor securing the cylinder against the forward side of said vertical wall of said intermediate member whereby upon removal ot said end member said securing means is exposed for access to the cylinder and the plunger.

GLENN A. PA'I'IERSON. 

